Adds a new constructor for gfx::Image on iOS.

ui/base/resource/resource_bundle_ios.mm

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/base/resource/resource_bundle.h"
 
 #import <QuartzCore/QuartzCore.h>
 #import <UIKit/UIKit.h>
 
 #include "base/files/file_path.h"
@@ skipping 145 matching lines @@
                                           orientation:UIImageOrientationUp]);
     }
 
     if (!ui_image.get()) {
       LOG(WARNING) << "Unable to load image with id " << resource_id;
       NOTREACHED();  // Want to assert in debug mode.
       return GetEmptyImage();
     }
 
     // The gfx::Image takes ownership.
-    image = gfx::Image(ui_image.release());
+    image = gfx::Image(ui_image, base::scoped_policy::RETAIN);
   }
 
   base::AutoLock lock(*images_and_fonts_lock_);
 
   // Another thread raced the load and has already cached the image.
   if (images_.count(resource_id))
     return images_[resource_id];
 
   images_[resource_id] = image;
   return images_[resource_id];
 }
 
 }  // namespace ui